Swedge > Combination Analysis
The Combination Analysis option in Swedge allows you to enter any number of discrete joint plane orientations, and all possible combinations of two joints which can form a wedge will be analyzed. The wedge with the minimum factor of safety is determined, and results can be plotted on histograms, scatter plots and the stereonet view.
NOTE: see the Combination Analysis Tutorial for a practical example which illustrates the use of this option.
The general procedure for carrying out a Combination Analysis with Swedge is as follows.
Analysis Type
Set the Analysis Type to Combinations. This can be selected in the Project Settings dialog or from the drop-list in the toolbar.
Joint Properties
In the Input Data 
dialog, the joint orientation data can be entered directly
or imported from a Dips file. You may define a single
set of joint data or two sets. If two sets are defined, then the two sets
can have different strength properties, and all possible combinations
(using one joint from each set), will be analyzed.
Slope Properties
Slope Properties, Tension Crack, and Forces are defined in the same way as for a Deterministic analysis, see the following topics for details.
Support (e.g. bolts, shotcrete) can be added as described in the Support Overview topic.
Compute
The Combination Analysis is computed when you select OK (or Apply) in the Input Data dialog, or when support is added or modified.
Analysis Results
After the analysis is computed, the Sidebar will display a summary of results for the wedge with the minimum safety factor. Results can be plotted on Histogram plots, Scatter plots etc. Data can also be exported for further analysis and processing. A summary of all input and output data, can be found in the Info Viewer.